| abstract |
A compound of formula (I), n n n n n n n n n n wherein R 1 , R 2 , R 3 and R 4 are selected from a saturated or unsaturated, branched or unbranched, cyclic or non-cyclic alkyl, or an amide, or a functional group, or a salt or a solvate thereof, or a protonated form thereof, and to the use thereof for the treatment of cancer. |